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Table 7 Multivariate analysis of risk factors associated with an Invalid TSPOT or Indeterminate QFT-3G (n = 51)

From: Poor concordance between interferon-γ release assays and tuberculin skin tests in diagnosis of latent tuberculosis infection among HIV-infected individuals

Risk factor

Odds Ratio and 95% Confidence Interval

Age > 40 years

0.9 (0.5, 1.6)

African-American Race

0.8 (0.3, 1.7)

Male gender

0.5 (0.2, 1.0)

CD4 count ≤ 200 cells/μl

3.6 (1.9, 6.8)

  1. QFT-3G = QuantiFERON-TB Gold in Tube
  2. TSPOT = T-SPOT. TB